Multilayer polymeric film
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United States of America Patent
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-
Apr 9, 1991
Grant Date -
N/A
app pub date -
Jun 23, 1988
filing date -
Jun 23, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polymeric multilayer film structure having a high percentage of fillers is disclosed. The fillers are concentrated in a separate filler containing layer having about 5 to about 20 percent of the thickness of the total multilayer film. The filler containing layer is coextruded with a base layer comprising the balance of the thickness of the multilayer film. By keeping the filler containing layer thin, relative to the total film thickness, a multilayer film having a filler concentration up to about 60 weight percent is achievable without significantly adversely affecting the material properties of the multilayer film structure.
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